Q. 18 - Biology

Question

During proofreading, which of the following enzymes reads the DNA? 

a. primase 

b. topoisomerase 

c. DNA pol 

d. helicase 

Step-by-Step Solution

Answer

Option c is the correct answer.

Step 1: Introduction

The process of proofreading involves examining the replicated DNA (deoxyribonucleic acid) to see if the nucleotides used are complementary to one another. By eliminating the fake base and replacing it with the nitrogenous base of interest, it will modify DNA.

Step 2: The explanation for the correct answer.

The enzyme responsible for creating a new DNA strand, DNA polymerase also proofreads and fixes some mistakes.

Step 3: The explanation for the incorrect options.

Primase is essential enzyme that aid in the replication of DNA. The topoisomerase enzyme splits the phosphate backbone while the helicase enzyme breaks the hydrogen bond to create a replication fork where new DNA strands are created. The nucleotide bases are not proofread.